{"id":2225413,"url":"http://patchwork.ozlabs.org/api/1.2/covers/2225413/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/cover/20260421022044.1217503-1-songmuchun@bytedance.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.2/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<20260421022044.1217503-1-songmuchun@bytedance.com>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/20260421022044.1217503-1-songmuchun@bytedance.com/","date":"2026-04-21T02:20:40","name":"[v3,0/4] mm: Fix vmemmap optimization accounting and initialization","submitter":{"id":78930,"url":"http://patchwork.ozlabs.org/api/1.2/people/78930/?format=json","name":"Muchun Song","email":"songmuchun@bytedance.com"},"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/cover/20260421022044.1217503-1-songmuchun@bytedance.com/mbox/","series":[{"id":500709,"url":"http://patchwork.ozlabs.org/api/1.2/series/500709/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=500709","date":"2026-04-21T02:20:40","name":"mm: Fix vmemmap optimization accounting and initialization","version":3,"mbox":"http://patchwork.ozlabs.org/series/500709/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/2225413/comments/","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=bytedance.com header.i=@bytedance.com\n header.a=rsa-sha256 header.s=google header.b=AZvTr4q6;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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Howlett\" ,\n\tVlastimil Babka ,\n\tMike Rapoport ,\n\tSuren Baghdasaryan ,\n\tMichal Hocko ,\n\tNicholas Piggin ,\n\tChristophe Leroy ,\n\taneesh.kumar@linux.ibm.com,\n\tjoao.m.martins@oracle.com,\n\tlinux-mm@kvack.org,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tlinux-kernel@vger.kernel.org","Subject":"[PATCH v3 0/4] mm: Fix vmemmap optimization accounting and\n initialization","Date":"Tue, 21 Apr 2026 10:20:40 +0800","Message-Id":"<20260421022044.1217503-1-songmuchun@bytedance.com>","X-Mailer":"git-send-email 2.20.1","X-Mailing-List":"linuxppc-dev@lists.ozlabs.org","List-Id":"","List-Help":"","List-Owner":"","List-Post":"","List-Archive":",\n ","List-Subscribe":",\n ,\n ","List-Unsubscribe":"","Precedence":"list","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Spam-Status":"No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"},"content":"The series fixes several bugs in vmemmap optimization, mainly about incorrect\npage accounting when vmemmap optimization is enabled for DAX and memory\nhotplug paths. Also fixes the pageblock migratetype initialization for\nZONE_DEVICE compound pages.\n\nv2 -> v3:\n- Drop patch 4 and patch 5 from v2 since the page table sync issue has\n already been fixed by Harry's series.\n- [Patch 1]: Remove an unintentionally left line.\n- [Patch 4 (previously Patch 6)]: Call cond_resched() every\n PAGES_PER_SECTION instead of every compound page, as suggested by\n Mike Rapoport.\n- Collect Acked-by and Reviewed-by tags from Mike Rapoport.\n\nMuchun Song (4):\n mm/sparse-vmemmap: Fix vmemmap accounting underflow\n mm/sparse-vmemmap: Pass @pgmap argument to memory deactivation paths\n mm/sparse-vmemmap: Fix DAX vmemmap accounting with optimization\n mm/mm_init: Fix pageblock migratetype for ZONE_DEVICE compound pages\n\n arch/arm64/mm/mmu.c | 5 +--\n arch/loongarch/mm/init.c | 5 +--\n arch/powerpc/mm/mem.c | 5 +--\n arch/riscv/mm/init.c | 5 +--\n arch/s390/mm/init.c | 5 +--\n arch/x86/mm/init_64.c | 5 +--\n include/linux/memory_hotplug.h | 8 +++--\n mm/memory_hotplug.c | 12 +++----\n mm/memremap.c | 4 +--\n mm/mm_init.c | 43 +++++++++++++++---------\n mm/sparse-vmemmap.c | 61 +++++++++++++++++++++++++---------\n 11 files changed, 104 insertions(+), 54 deletions(-)"}